package com.sky.service.admin.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.admin.EmployeeMapper;
import com.sky.pojo.Employee;
import com.sky.result.PageResult;
import com.sky.service.admin.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.annotation.Resource;
import java.beans.beancontext.BeanContext;
import java.time.LocalDateTime;

/**
 * 员工业务层实现类
 */
@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Resource
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();//

        //1、根据用户名查询数据库中的数据  select * from employee where username = #{username}
        Employee employee = employeeMapper.findByName(username); //

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }
        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     *
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        // 复制信息
        BeanUtils.copyProperties(employeeDTO, employee);
        // 补充参数
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        employee.setStatus(StatusConstant.ENABLE);
        // 通过注解公共字段填充
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//        // 从ThreadLocal中取出来当前用户id
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.insert(employee);
    }

    /**
     * 员工分页,使用分页插件PageHelper
     *
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.list(employeePageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 修改员工
     *
     * @param employeeDTO
     */
    @Override
    public void modifyEmployee(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        // 通过注解公共字段填充
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }

    /**
     * 根据id查找员工
     *
     * @param id
     * @return
     */
    @Override
    public Employee findingEmployee(Long id) {
        Employee employee = employeeMapper.findById(id);
        // 保护用户密码
        employee.setPassword("******");
        return employee;
    }

    /**
     * 修改员工状态
     *
     * @param status
     * @param id
     */
    @Override
    public void modifyEmployeeAccountStatus(Integer status, Long id) {
        // 建造者模式
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .updateTime(LocalDateTime.now())
                .updateUser(BaseContext.getCurrentId())
                .build();
        employeeMapper.update(employee);
    }
}
